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← ScienceWhich phenomenon results when a laser's temporal coherence degrades?
A)Increased linewidth in the spectral output✓
B)Higher overall output beam intensity
C)Better focusing at longer distances
D)Reduced speckle in reflected light
💡 Explanation
Degraded temporal coherence leads to lasers emitting a wider range of frequencies; this is because the interference fringes broaden, so the linewidth increases rather than cleaner monochromatic output, as high coherence yields, therefore the spectral bandwidth will increase rather than decrease.
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